Color image processing apparatus and color printer system
    22.
    发明授权
    Color image processing apparatus and color printer system 有权
    彩色图像处理装置和彩色打印机系统

    公开(公告)号:US07679781B2

    公开(公告)日:2010-03-16

    申请号:US11362900

    申请日:2006-02-28

    IPC分类号: G03F3/08

    CPC分类号: H04N1/6022

    摘要: A color image processing apparatus includes: a minimum value selection unit that selects a minimum value of an input gray level values; a first calculation unit that calculates a generation amount of black; a second calculation unit that calculates an UCR amount which is a value relevant to the minimum value; a third calculation unit that outputs a correction coefficient value which is a value relevant to the minimum value; a subtraction unit that subtracts the UCR amount from each of the input gray level values to generate output; a multiplication unit that multiply the output of the subtraction unit by the correction coefficient value; a significant bit selection unit that selects a significant bit of a multiplication result; and a gray level correction unit that makes a gray level correction to the generation amount of black and the output of the multiplication unit.

    摘要翻译: 彩色图像处理装置包括:最小值选择单元,其选择输入灰度值的最小值; 计算黑色的产生量的第一计算单元; 第二计算单元,计算作为与所述最小值相关的值的UCR量; 第三计算单元,输出与最小值相关的值的校正系数值; 减法单元,从每个输入灰度值减去UCR量以产生输出; 乘法单元,将减法单元的输出乘以校正系数值; 选择乘法结果的有效位的有效位选择单元; 以及对黑色的产生量和乘法单元的输出进行灰度校正的灰度级校正单元。